JPS5853274Y2 - crawler track - Google Patents

Description

[Detailed description of the invention] The present invention relates to tracks used for small snowmobiles, crawlers for agricultural machinery, vehicles for running on sand, etc. The present invention relates to a track having a traction pattern suitable for a vehicle.

Conventionally, in this type of crawler track, as shown in Fig. 1, the crawler track 1 is wound endlessly around a drive sprocket 2 and an idler sprocket 3, and is rotated by the power transmitted by the drive sprocket 2. The crawler track 1 is provided with a suspension device.

Inside the crawler track 1, there are reinforcing cloths 5a and 5c as shown in FIG.
A reinforcing core body 5 made of a reinforcing cord layer 5b such as a steel cord is provided, and lateral reinforcing members 6 that support the lateral load of the crawler track 1 are arranged at regular intervals in the direction perpendicular to this reinforcing core body 5. The reinforcing material 6 is made of steel, FRP, or the like.

Furthermore, a drive lug 7 is provided protruding from the crawler track 1, and the crawler track 1
Two rows of gaps 8 are formed in the length direction of the holder, in which teeth engage with each other for the purpose of transmitting driving force.

A protrusion 9 is provided on the ground contact surface on the outer peripheral side of the crawler belt 1 to improve the transmission of traction force between the crawler belt 1 and the running surface.

The protrusions 9 play an extremely important role in maintaining good running performance of the crawler track 1, and research and development have been carried out for a long time, and various proposals have been made.

Typical examples thereof are disclosed in Japanese Patent Publication No. 48-4263 and Japanese Utility Model Publication No. 50-22425, and the structure shown in FIGS. 3a and 3b, for example, is known.

In the conventional example shown in FIG. 3a, the protrusions 9 are 9a, 9b.
, 9c, and 9a is 450 or 45
Gentle slope with angle close to °, 9b is 90° or 90°
9c is a rounded curved surface with a radius of about 2 to 3 mm.

In addition, in the conventional example shown in FIG.
is the same as the case shown in Figure a, but the surface 9c is flat and has a traction pattern.

In such conventional technology, when the running surface is relatively soft such as fresh snow, the protrusions 9 pierce the running surface and increase the density of the running surface through tamping or compaction action to obtain traction force. The crawler track 1 can be made to run.

However, in the case of a hard running surface such as an ice surface or a trodden snow surface, it is not only hard but also has small irregularities, so the traction pattern made of the long ridges 9 described above has poor grip performance. This has the disadvantage of causing slippage in the traveling direction or lateral direction, resulting in insufficient traction force.

In order to overcome these drawbacks, some crawlers have a large number of metal studs driven into them, but these crawlers have the disadvantage that the strength of the crawler itself decreases due to the driving of the metal studs.

In view of the above-mentioned problems, the purpose of the present invention is to form a special traction pattern on the ground contact surface of the track itself, without reducing the strength of the track itself as would be the case with metal stud driving. To provide a crawler track which improves grip performance on a hard running surface having small irregularities such as a covered snow surface, and also maintains high traction force on a soft snow surface.

The crawler track according to the present invention that achieves the above object has lateral reinforcing members buried at predetermined intervals in the longitudinal direction of the crawler track, and independent blocks of different sizes with different ground contact areas on the ground side surface corresponding to the lateral reinforcing members. A plurality of intermediate grooves are provided between the independent blocks arranged along the horizontal reinforcing member, and an intermediate groove is formed between the independent blocks arranged along the other horizontal reinforcing member adjacent to the horizontal reinforcing member. The intermediate grooves formed in the crawler belt are arranged in a staggered manner along the longitudinal direction of the crawler track.

The present invention will be further described below with reference to embodiments shown in the accompanying drawings.

FIG. 4 shows a traction pattern of an embodiment of the crawler according to the present invention, FIG. 5 is a sectional view taken along the line C--C in FIG. 4, and FIG. It is an enlarged perspective view of a block.

In these figures, lateral reinforcing members 6 are embedded at predetermined intervals in the longitudinal direction of the crawler track 1, and drive lugs 7 are provided protruding from the inner surface of the crawler track 1 along the lateral reinforcing members 6. At the same time, there are multiple independent blocks 1 on the opposite ground plane side.
0 is arranged.

The plurality of independent blocks 10 are arranged along the horizontal reinforcing member 6 so that blocks 10' with a large surface area of the ground plane 10c and blocks 10'' with a small surface area are mixed, so that the edges around the blocks are discontinuous. ○Also, when viewed from the side, small independent blocks 10 are arranged, as shown in Fig. 5.
The front and rear surfaces 10a' and 10b' are located inside the front and rear surfaces 10a and 10b of the large independent block 10, and the edge lengths along the longitudinal direction of the crawler track 1 are both long and short.

Moreover, an intermediate groove 10 interposed between these independent blocks 10
e and intermediate grooves 10e interposed between independent blocks 100 arranged along other lateral reinforcements 6 adjacent to the lateral reinforcement 6 are arranged so as to be offset in the longitudinal direction of the footwear 1. There are 1 le.

More specifically, in this embodiment, each independent block 10 has a back side of 45 degrees with respect to the direction of movement, similar to the conventional protrusion 9.
It is a gentle slope 10a with an angle close to 90 degrees or 450 degrees, and the side facing the direction of travel is a steep slope 10b close to 90 degrees or 900 degrees.

Moreover, on the ground plane 10c of each independent block 10,
One or two shallow cut grooves 10d are provided.

When the crawler track 1 having the above-described traction pattern travels on a hard running surface with unevenness such as a water surface or a compacted snow surface, a plurality of independent blocks 1 having a large and small ground contact area are used.
Since each of the 0's corresponds to the unevenness of the running surface and independently brings the ground contact surface into close contact, it is possible to improve the adhesion to the running surface and the grip strength compared to the conventional long protrusion 9. .

Moreover, since the independent block 10 of the present invention is provided along the lateral reinforcing member 6, the load of the vehicle body is concentratedly applied via the lateral reinforcing member 6, thereby increasing the grip force on the running surface. can do.

Therefore, no slipping occurs in the traveling direction or the lateral direction on an uneven ice surface or a compacted snow surface.

In particular, when the shallow cut groove 10d is provided in the ground plane 10c of the independent block 10 as in the embodiment, the grip performance can be further improved.

Furthermore, when a crawler track having independent blocks generally runs on a soft snow surface, the traction force is obtained by the reaction force when compressing the snow S on the rear surface of the independent block 10, as shown in FIG.

However, when this block 10 compresses the snow S to a certain extent or more, a shear plane F as shown by the broken line is generated between the compressed snow S and the snow below it, so that the subsequent traction force is applied to this shear plane F. ○ Therefore, in a narrow block like the block 10, the total shear area, that is, the total friction area is smaller than the conventional long protrusion 9, so the traction force is slightly lower. descend.

However, in the above-described traction pattern according to the present invention, the intermediate groove 10e between the independent blocks 10 and the intermediate groove formed between the independent blocks 10 arranged along the laterally reinforcing member 6. 10e are in a misaligned relationship in the longitudinal direction of the crawler track 1, so that the portion corresponding to the intermediate groove 10e, which is left without the above-mentioned shear plane F, is attached to the adjacent lateral reinforcing member 6. It will be sheared by the next independent block 10 arranged along the
Therefore, the total shear area, that is, the total friction area can be made almost the same as the total friction area of the conventional long protrusion 9, and a large traction force can be obtained.

That is, it is possible to exhibit sufficiently satisfactory grip performance even on soft running surfaces such as fresh snow.

FIG. 7 shows another embodiment of independent blocks.

This independent block 20 has a ground plane 20c having an oval planar shape, and is otherwise similar to the independent block 10 of the above embodiment.

Even in such an independent block 20, the ground plane 20c
A plurality of reinforcing members having different areas may be arranged along the horizontal reinforcing member 6.

FIG. 8 shows yet another embodiment of independent blocks.

In this independent block 30, the ground plane 30c has a substantially ■-shaped planar shape, the side surface 30a is a protrusion, and the side surface 30b is a recess.

In this case as well, a plurality of reinforcing members having different ground contact areas are arranged along the horizontal reinforcing member 6, as in the above embodiment.

The independent blocks can have a wide variety of shapes other than those described above, and it is also possible to mix different shapes at the same time.

As described above, according to the present invention, lateral reinforcing materials are buried at predetermined intervals in the longitudinal direction of the crawler track, and a plurality of independent blocks of different sizes and sizes having different ground contact areas are provided on the ground side surface corresponding to the lateral reinforcing materials. an intermediate groove formed between the independent blocks arranged along the horizontal reinforcing member, and an intermediate groove formed between the independent blocks arranged along the other horizontal reinforcing member adjacent to the horizontal reinforcing member; The intermediate grooves formed are arranged in a staggered manner along the longitudinal direction of the crawler track, so on hard uneven running surfaces such as ice surfaces, each independent block adheres independently according to the unevenness, and the lateral reinforcement Since the vehicle body load is concentratedly applied through the vehicle, a strong grip force is generated, and a large traction force can be obtained without causing slippage in the direction of travel or in the lateral direction.

In addition, on soft running surfaces such as fresh snow, the snow in the areas corresponding to the intermediate grooves arranged in a staggered manner does not generate shear surfaces.
It is possible to obtain the same traction force as conventional protrusions.

[Brief explanation of drawings]

FIG. 1 is a schematic explanatory diagram showing a general usage example of a conventional crawler track,
Figure 2 is an enlarged perspective view taken along line A-A in Figure 1 and shows the contact surface side of the crawler track, Figures 3a and b are cross-sectional views taken along line B-B in Figure 2, and Figure 4 is the main A perspective view showing the crawler track of the invention, Figure 5 is the fourth
6 is an enlarged perspective view of an independent block provided in the same crawler belt, FIGS. 7 and 8 are enlarged perspective views of independent blocks according to other embodiments, and FIG. 9 is a sectional view taken along the line CC in the figure. FIG. 2 is an explanatory diagram showing a longitudinal cross-section of a situation when a crawler track having independent blocks runs on a soft snow surface. 1... Crawler track, 2... Drive sprocket, 5... Reinforcement core, 6... Lateral reinforcement, 10, 20° 30... ...independent block, 1
0'...Large independent block, 10...
...a small independent block.

Claims (1)

[Scope of utility model registration request] Lateral reinforcing materials are buried at predetermined intervals in the longitudinal direction of the crawler track, and a plurality of independent blocks of different sizes with different ground contact areas are arranged on the ground contact side surface corresponding to the lateral reinforcing materials. Intermediate grooves formed between independent blocks arranged along the material and intermediate grooves formed between independent blocks arranged along other transverse reinforcement adjacent to the transverse reinforcement A crawler track characterized by having one line arranged along the direction.